Contents Catalog
The gypsum powder production line uses natural raw gypsum (dihydrate gypsum) as raw material. Through crushing, grinding, and calcining processes, it produces various types of gypsum powder, including building gypsum powder and anhydrite powder.
Complete gypsum grinding process:
- Gypsum ore processing: Jaw crushers and hammer crushers reduce the particle size to less than 25 mm.
- Next, it undergoes fine grinding using various grinding mills.
- After classification by a powder concentrator, qualified powder is collected by a cyclone collector and sent to a rotary kiln for calcination.
- At around 150°C, mature gypsum is formed. When heated above 170°C, anhydrite is produced.
- Finally, the gypsum powder is cooled, packaged, and sold.
The production line is equipped with a pulse jet dust collector to capture dust and impurities, improving the cleanliness of the working environment.
This equipment not only protects worker health but also ensures high-quality gypsum powder, meeting the needs of building materials, wallboard manufacturers, and fertilizer manufacturers.
The grinding mill is the core of the entire production line and directly affects the fineness and quality of the gypsum powder.
During the gypsum grinding stage, it is crucial to select the appropriate grinding equipment based on production needs and final product requirements.
Common gypsum grinding machines include Raymond mills, ultrafine mills, and vertical roller mills.
Raymond Mill
The Raymond mill is a traditional gypsum grinding machine suitable for small and medium-sized enterprises. The grinding process is accomplished through the extrusion of rollers and rings, making it ideal for processing gypsum with a moisture content below 6%.
Composition and Structure of a CRRM Raymond Mill
Grinding rollers: These rollers integrate core functions such as grinding, fineness adjustment, efficiency enhancement, wear resistance, and uniformity. They grind the material into powder through rotary extrusion, allowing for flexible adjustment of pressure to meet varying fineness requirements. Made of high-hardness, wear-resistant material, they offer stable wear resistance and a long service life. During grinding, the material is evenly stressed, preventing over- or under-grinding and ensuring uniform particle size.
Grinding ring: It works in conjunction with the grinding roller at high speed to grind large materials into fine powder. Its core function is to firmly support the grinding roller during operation and guide it along a stable rolling path. The two work together to compress the ground material, ensuring efficient operation.
Scraper: Its primary function is to scoop up the material entering the mill and move it between the grinding roller and grinding ring for grinding. It is typically made of wear-resistant material to resist abrasive wear.
Analyzer: It controls the fineness of the finished product. The particle size of the powder is controlled by adjusting the analyzer speed.
Blower: It blows the ground powder into the analyzer for sorting.
Cyclone collector: It collects qualified finished powder.
Piping system: Connects the various components to ensure smooth airflow.
Working Principle of the CRRM Raymond Mill
Coarse Crushing: Large raw materials are crushed into particles ≤30mm by the crusher for subsequent grinding.
Quantitative Conveying: An electromagnetic vibrating feeder continuously delivers a quantitative amount of coarsely crushed raw materials to the grinding zone, ensuring stable and continuous grinding.
Grinding and Pulverizing: The grinding rollers use centrifugal force to press against the rotating grinding rings, forming a “rolling belt.” The raw materials are crushed into powder through the dual compression and shearing action.
Grading and Sorting: The powder enters the turbine classifier with the airflow, where coarse particles fall back into the grinding zone, while qualified fine powder enters the collection system. The fineness of the finished product is controlled by adjusting the classifier speed.
Efficient Collection: Qualified fine powder is separated and collected in a cyclone collector and can be directly packaged or sent to the next process.
CRRM Raymond Mill Features
Production Capacity: 7.5-33 t/h
Finance: 80-325 mesh
Maximum Feed Particle Size: 30 mm
The CRRM Raymond Mill is specialized in efficiently grinding non-flammable and explosive ores with a Mohs hardness of 7 or below and a moisture content below 6%, such as limestone, marble, calcite, feldspar, barite, dolomite, medical stone, granite, bentonite, kaolin, bauxite, gypsum, talc, fluorite, coal slag, red iron oxide, and iron ore.
The finished particle size can be flexibly adjusted between 80 and 325 mesh. The equipment accepts a maximum feed particle size of 30 mm, with a 325 mesh pass rate of ≥95% and uniform particle size. Production capacity ranges from 7.5 to 33 t/h. Highly customizable, it can be upgraded to a pulverizer to meet specific customer needs. This integrated system combines multiple superior features, effectively enhancing the product’s overall added value.
CRRM Raymond Mill Product Advantages
Vibration and Noise Reduction: The main unit incorporates comprehensive vibration reduction technology to reduce vibration and noise, ensuring smooth and reliable operation, extending service life, and reducing maintenance costs.
Structural Innovation: The innovative structural design is energy-efficient and environmentally friendly, improving grinding efficiency, saving energy costs, and enhancing production efficiency.
Reducer Design: The new heavy-duty design is shock-resistant and wear-resistant, compatible with both electric and pneumatic control, simplifying installation and maintenance.
Intelligent Control: Equipped with an intelligent control system, it allows one-touch start and stop, flexible parameter adjustment, reducing labor intensity and enabling intelligent, automated production.
Blower Valve Adjustment: The integrated blower design and equipped with a flexible blower valve ensure optimal air volume and pressure, ensuring consistent product quality.
